IL46362A

IL46362A - Motion converter

Info

Publication number: IL46362A
Application number: IL46362A
Authority: IL
Original assignee: Puzey C; Cochrane E; Turner J
Priority date: 1974-01-28
Filing date: 1974-12-30
Publication date: 1977-04-29
Also published as: BR7500560A; CA1004060A; IL46362A0; BE824683A; FR2259295B1; OA04889A; DE2502646A1; AU7714175A; SE7500834L; IT7567089A1; GB1467531A; NL7500921A; CH587427A5; JPS50107370A; ZA74562B; IN144494B; SE404721B; FR2259295A1; ES434204A1

Abstract

1467531 Reciprocating pumps; reciprocating piston compressors; IC engine main driving gear; oscillating pistons C R PUZEY EDD COCHRANE and J W TURNER 2 Jan 1975 [28 Jan 1974] 129/75 Headings F1A F1B and FIN [Also in Division F2] A crank linkage mechanism for converting combined reciprocating and oscillatory motion of a piston 12 about one axis into rotary motion of a flywheel 14 about another axis, and vice-versa, comprises a ball-ended arm 18 connected fast at 28 to the piston 12 to project at right-angles therefrom and having its ball-end 19 seated in a bearing unit 20 slidably reciprocably mounted in an axial bore 21 in the flywheel 14. Lubricant is fed, via ducts 25, to the slidable bearing unit 20 and the seating of the ball-end 12 therein. Alternative sliding bearing units 20 for mounting the ballend 19 of the arm 18 in plain (22) or ball races (30, 32) are illustrated in Figs. 3 to 6 (not shown). The mechanism can be used in a twin-cylinder two or four stroke cycle I.C. engine having the common piston 12 driving through the flywheel 14 to an output shaft 15, which arrangement could alternatively form a pump or compressor with the shaft 15 forming the input. [GB1467531A]

Description

46362/2 Motion converter CLIVE ROYDON PUZEY, EDWARD DENZIL DUNDONALD COCHRANE, JAMES WILLIAM TURNER C: 44354 THIS invention relates to a machine comprising a piston movable to and fro in the direction of its long axis a cylinder and capable of movement about that axis and a motion converter for converting this motion to rotary motion.

Machines have already been proposed in which the piston moves as described above and is linked to a fly wheel by means of a torque arm rooted on the piston and carrying at its free end a part spherical head which is adapted to engage in a complemental socket in the fly wheel. See, for example, British Patent Nos. 1191556 and 216171. By this means the motion of the piston is converted into the rotary motion of the fly wheel or vice versa.

Due to the forces involved it is desirable to kee the length of the torque arm as short as possible. It is also desirable that the diameter of the fly wheel should not be reduced as this shortens the length of the stroke of the piston.

However, if the torque arm is made shorter then it must describe a greater angle if it is to engage with a fly wheel of unchanged diameter. The shortening of the torque arm has the effect that there is increased lateral displacement of the head of the torque arm in the fly wheel. By lateral displacement is meant movement parallel to the axis of rotation of the fly wheel.

This increased lateral displacement of the torque arm presents mechanical difficulties in designing a bearing which can retain the head in the fly wheel but can transmit the necessary torque.

It is an object of the present invention to provide a machine with such a bearing.

A machine according to the invention comprises a piston movable to and fro in the direction of its long axis within a cylinder and capable of movement about that axis, a rotor mounted adjacent the piston for rotary movement about an axis intersecting the long axis of the piston, a torque arm rooted on the piston, a head formed on the free end of the torque arm and a socket in the rotor adapted to house the head so that the torque arm can transmit motion between the piston and the rotor wherein the socket is formed in a body capable of moving to and fro along a passage formed within the rotor, the axis of the paseage being parallel to the axis of rotation of the rotor.

In one embodiment of the invention the head has a part spherical surface and the body is a shell-bearing having a complementally shaped inner surface to form the socket . in an alternative form of the invention the head carries a self-aligning ball-bearing comprising an inner race on the head* an outer race in the body to form the socket and balls held between the two races.

Suitably the passage is a bore and the body is cylindrical.

The invention will now be described by way of example only with reference to the accompanying drawings in whichs- Figure 1 is a cross section through an internal combustion engine employing one type of motion converter of the invention/ the piston being at mid-stroke.

Figure 2 is a longitudinal section through the engine of Figure .1, the piston being at one end of its stroke.

Figure 3 is a longitudinal section through one embodiment of a motion converter. 46362/2 Figure 4 is a plan view of the motion converter shown in Figure 3.

Figure 5 is a longitudinal section through an alternative embodiment of the motion converter.

Figure 6 is a plan view of the motion converter shown in Figure 5.

In Figures 1 and 2 a cylinder 10 is closed at both ends by cylinder heads 11. A piston 12 is arranged to reciprocate and to oscillate in the cylinder 10 along and about its axis 36 by means of a suitable internal combustion cycle which is not directly relevant to the present invention. The cycle is usually a two-stroke cycle but could be a four-stroke cycle. The cylinder 10 is housed in a cylinder block 13.

Adjacent the cylinder 10 is a crank-case 17 which houses a fly wheel 14 carried by a shaft 15 which is journalled in a bearing 16. In this case the shaft 15 is a drive-shaft but in the case of a pump or compressor this would be the driven shaft.

Motion is transmitted between the piston 12 and the fly wheel 14 by means -of_ a torque .arm " -— · · bearing 20. The shells-bearing 20 can reciprocate in a sleeved bore 21 formed in the fly wheel 14. The axis of the bore 21 is spaced from but parallel to the axis of the shaft 15.

From Figure 2 it can be seen that when the piston 12 is at one end of its stroke then the head 19 has moved deeply into the bore 21. At mid-stroke of the piston 12, i.e. the position shown in Figure 1/ the head is at its shallowest position in the bore 21. In both positions and at all intermediate positions the head 19 has full purchase on the fly wheel 14. At maximum torque, i.e. when the piston is at the end of its stroke the torque arm 18 is at right angles to both the piston 12 and the fly wheel 14. At mid-position when the torque is at the lowest the torque arm 18 subtends the greatest angle with the fly wheel 14.

It can be seen from Figures 3 and 4 that the shell-bearing 20 and a removable seat 22 form a part spherical socket for the head 19. The surfaces of the shell-bearing 20 and the head 19 may be coated with chromium to reduce wear. The seat 22 can be removed by withdrawing the locking screw 23 (Figure 4) and inserting a special tool in the key-holes 24 and unscrewing the seat . The head 19 is lubricated by oil which is fed from a pump (not shown) through passages 25. Some of the oil then passes along an oil feed gallery 26 leading to the piston. In order to ensure that the oil feed gallery 26 is always connected to the passage 25 the top of the head 19 is cut away to form an oil chamber 27. The end of the torque arm 18 remote from the head 19 passes through the piston and is secured by a lock-nut 28.

The embodiment shown in Figures 5 and 6 comprises a self-aligning ball-bearing carried by the head of the torque arm IS. An inner race 29 is secured to the head of the torque arm 18 by a lock-nut 35. A number of balls 30 contained by a cage 32 are held between the inner race 29 and a split outer race 31 which is secured by a ring 33 locked in the shell-bearing 20 by a locking screw 34 (Figure 6) .

Claims

1. A machine comprising a piston movable to and fro in the direction of its long axis within a cylinder and capable of/movement about that axis"', a rotor' mounted adjacent the piston for rotary movement about an axis /intersecting the long axis of the piston, a torque arm rooted on the piston, 'f. a head/formed on the free end of the torque arm and a socket in the rotor adapted to house the head so that the torque arm can transmit motion between the piston and the rotor, wherein the socket is formed in a body capable of moving to and fro ·% along a passage formed within the rotor, the axis of the passage being parallel to the axis of rotation of the rotor.

2. A machine as claimed in Claim 1 wherein the head has a part spherical surface and the body is a shell-bearing having a complementally shaped inner surface to form a socket -

3. A machine as claimed in Claim 1 wherein the head carries a self-aligning ball-bearing comprising an inner race on the head, an outer race in the body to form a socket and balls held between the two races.

4. A machine as claimed in any one of the preceding claims wherein the passage is a bore and the body is cylindrical. 5o A machine substantially as herein described with reference to Figures 1 and 2 of the accompanying drawings. A motion converter substantially as herein described with reference to Figures 3 and 4 of the accompanying drawings. A motion converter substantially as herein described with reference to Figures 5 and 6 of the accompanying drawings. pplicants JlDiCOHN AND PARTNER